Despite having a smaller battery capacity, the new iPhone 6s and iPhone 6s Plus achieve the same battery life as their predecessors, the iPhone 6 and iPhone 6 Plus. PhoneArena spotted a scene in Apple's promotional video showing a 1,715 mAh lithium-ion battery, a reduction from the 1,810 mAh package inside the iPhone 6.
But as per Apple's Tech Specs webpage, the iPhone 6s provides the same ten hours of 3G or 4G data use, eleven hours of video playback and fourteen hours of talk time on 3G as its predecessor, the iPhone 6.